Maybe. The point in those examples was that they all solved search in a specific contextualized manner impressively well and despite that people are creatures o

Maybe. The point in those examples was that they all solved search in a specific contextualized manner impressively well and despite that people are creatures of habit and they'll want to port the same generalized patterns over that they do for everything else. Not consciously. They'll just do it and expect it to work which is why effective indexing and "SEO" (as in, the engine can scrape the content and crawl around without getting confused) is likely the actual work to do to implement "search".